Abdul-Rahman bin Abu Layla reported,

No one informed me that they had seen the Prophet ﷺ performing the forenoon prayer except Umm Hani. She reported that the Prophet ﷺ entered her house on the day of the conquest of Mecca and prayed eight rakahs. She said, "I never saw him pray a prayer lighter than it, yet he completed the bowing and prostration."Ibn Bashshar did not mention the word "ever" in his version of the hadith.

Muslim 1667

Sahih

و حدثنا محمد بن المثنى وابن بشار قالا حدثنا محمد بن جعفر حدثنا شعبة عن عمرو بن مرة

عن عبد الرحمن بن أبي ليلى قال

ما أخبرني أحد أنه رأى النبي ﷺ يصلي الضحى إلا أم هانئ فإنها حدثت أن النبي ﷺ دخل بيتها يوم فتح مكة فصلى ثماني ركعات ما رأيته صلى صلاة قط أخف منها غير أنه كان يتم الركوع والسجود ولم يذكر ابن بشار في حديثه قوله قط

مسلم 1667صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Travelers' prayer and its shortening
Chapter
Recommendation of Duha prayer, that its minimum is two rakahs and its most complete is eight rakahs and its middle is four or six rakahs, and the encouragement to maintain it
Numbering
Darussalam 1667
Muslim 1667